I'm not saying it's the definition, I'm saying it's meant to. Which is obvious, if you consider the scale of certain events (minimum player entrance requirement, for example, or even events allowing up to 64 members and encouraging 18+). Sure, you can play solo for some of its content (lately possibly most of its content), but that wasn't the design. As such, the logic behind gearing towards multiplayer-efficiency isn't a fallacy on SE's part.
Right now, no one knows what the trial is. People are just bitching about unconfirmed test server information. Which isn't bad in itself, it shows SE how pissed off people are already and will hopefully result in them not considering such a ridiculous trial. I agree if it's like it is now when they release it, no one will do it. But again, that's another issue altogether. The idea of enhancing one person to support their party isn't wrong in itself, if executed correctly. It's all on SE now to show us if they know how to do it correctly (I'm guessing not, but I won't judge before it's released).